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java - Generally speaking, does a service need to throw exceptions to the Controller for handling?

{code...}

From [Javadiscussion group] 2017-05-17 10:08:28 0  3  758

Class.forName(driverClass) not running

System.out.println("======1======");Class.forName(driverClass);conn = DriverManager.getConnection(&q...

From [Javadiscussion group] 2017-05-17 10:08:27 0  6  791

concurrency - Java concurrently processes a large amount of data in a table, how to set checkpoints so that they can be used for failure recovery instead of repeatedly processing the processed data?

Java concurrently processes a large amount of data in a table. How to set checkpoints for failure recovery ins...

From [Javadiscussion group] 2017-05-17 10:08:26 0  1  805

java - How to break tomcat keeps starting

How to fix tomcat keeps starting?

From [Javadiscussion group] 2017-05-17 10:08:25 0  1  840

Java - An error occurred during testing. Please help me find out what happened.

This is the error message {code...} Test class TestUsersDAOImpl. {Code...} Custom session factory MyHibernateS...

From [Javadiscussion group] 2017-05-17 10:08:23 0  4  627

java - How to access the page under web-inf in the Eclipse project in the browser, is it not possible to access it directly? How to write in the address bar

How to access the page under web-inf in the Eclipse project in the browser? Can't access it directly? How to w...

From [Javadiscussion group] 2017-05-17 10:08:22 0  2  839

spring-mvc - Java String The previous line can also output a value, but after entering the if, it becomes a null pointer.

As shown in the two figures above, I passed in a decidedDistribute from the front desk. From the output, it ca...

From [Javadiscussion group] 2017-05-17 10:08:18 0  5  635

java - About the design of Spring MVC login system

My current idea is to define a User object, which includes uid, username, password, isLogined, etc. Then set u...

From [Javadiscussion group] 2017-05-17 10:08:17 0  4  680

How to use java objects to represent complex json?

There is a kind of json object that needs to be used a lot, so I want to encapsulate it into an object, {code....

From [Javadiscussion group] 2017-05-17 10:08:15 0  2  704

java - How to implement: when entering a list page, different products are displayed every time? Details enter

For example, a mall has 10 merchants, each of which has many products. The demand is: every time the user refr...

From [Javadiscussion group] 2017-05-17 10:08:10 0  1  645

java - In order to avoid the complex one-to-many-to-many relationship in the database, I designed the database without foreign keys. Is this possible?

In order to avoid the complex one-to-many-to-many relationship in the database, I designed the database so tha...

From [Javadiscussion group] 2017-05-17 10:08:09 0  5  673

java - message queue processing critical time problem

Now the message is received from the message queue and then written to the file. Write one every hour, which i...

From [Javadiscussion group] 2017-05-17 10:08:07 0  2  740

When Java exports CSV, it is required to wrap lines without formatting.

The following data is output to a CSV cell: just wrap {code...} in this cell. Even changing to r or rn will no...

From [Javadiscussion group] 2017-05-17 10:08:06 0  2  686

java - Count the daily clicks of the top ten ads from 20170403 to 20170420

There is an advertisement table advertise(advertise_id, date, count) with the following data: I need to count ...

From [Javadiscussion group] 2017-05-17 10:08:03 0  2  737

java - Why can't I choose tomcat 7.0?

(www.sf.gg) is China's leading developer technology community. We hope to provide a pure, high-quality technic...

From [Javadiscussion group] 2017-05-17 10:08:02 0  1  818